名校
1 . 如图,直线
,线段
分别与直线
、
交于点
、点
,满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/2d84ceda-9927-4bc2-9746-fa3bdd38277d.png?resizew=195)
(1)使用尺规完成基本作图:作线段
的垂直平分线交
于点
,交
于点
,交线段
于点
,连接
、
、
、
保留作图痕迹,不写作法,不下结论);
(2)求证:四边形
为菱形(请补全下面的证明过程),
证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
,
______①,
垂直平分
,
,
,
______②
,
______③,
,
,
,
四边形
是 ______④,
,
四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e03566282ef39ad17821036f228174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7159d113d1301b49171e736384f00131.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/2d84ceda-9927-4bc2-9746-fa3bdd38277d.png?resizew=195)
(1)使用尺规完成基本作图:作线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8946331b0a9d86e1a9c78797f3021455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a679040c4d556723e482bacbab41356d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93dd4d854fbc236bccbd97a5d715fe97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc53882f1044379aa1e97058ec270bb4.png)
(2)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015572e6a2862542050c335211b3d0f2.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e03566282ef39ad17821036f228174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51a68009f72334317d070b3b95d72f19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb6acdcab687e9e1c279f39d3d08f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3236110357d25c22bbc64bd7ecf4b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97bccad388b030ba654cf2994e412cd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f04885afb1c5eac1980e1062737bb7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62b5745ab14859a65d8160de62e785c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5b6c8b77770c1c350060e891e4c2294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16798b9a7e95b6adeb95e18f960f2e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456859f994b8766323823c0ff3a9c440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015572e6a2862542050c335211b3d0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c48f615291ac9ea67d6a5279b5ebc74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/015572e6a2862542050c335211b3d0f2.png)
您最近一年使用:0次
2023-12-16更新
|
302次组卷
|
4卷引用:2023年重庆市开州区书院教育集团中考一模数学试题
2023年重庆市开州区书院教育集团中考一模数学试题(已下线)专题25 尺规作图+补全证明过程(35道)-学易金卷:5年(2019-2023)中考1年模拟数学真题分项汇编(重庆专用)重庆市沙坪坝区第八中学校2023-2024学年九年级上学期期末数学模拟试题河南省郑州市郑州二中附属学校2023-2024学年上学期九年级第三次考试数试题
2 . 如图,在
中,
,
平分
于点M,交
于点G,
平分
,交
于点D,交
于点F.
(1)求证:
是等腰三角形;
(2)若
,图中是否存在等边三角形?若存在,请写出来并证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a582ed67bea9b1c5aa40e60532099b97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e8a1415f0852a52c9a1ff68f24945b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/c36ae13e-a051-4efd-a65c-083f0b47dd13.png?resizew=198)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68e744f480e11f588570c5d6738799f5.png)
您最近一年使用:0次
3 . 在
中,
,
是边
的中点,
于点
,
平分
.
(1)求证:
平分
;
(2)过点
作
的垂线交
的延长线于点
,
①求证:
;
②
是什么三角形?证明你的猜想.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce7f6d278f2ef7a193b7eed7be6b3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82da6815bc213dfd78c2f77cd7ded8ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8d0d5254ed9e296b76ac3b4d40a13a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b664f3a011a2f1f31c66a2635c5367c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/dbe31eb8-5657-47aa-a8dc-7f778270aa59.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b05e9b20f0048c8a296ec86e21d33fb.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccdee92eb6770033f7953f5622e0e506.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f086e5309e9d6e3aca2de90667f1a2c5.png)
您最近一年使用:0次
4 . 阅读与思考
(1)【特例呈现】
如图1所示,数学活动课上,在折叠等腰三角形纸片的过程中,小明发现:等腰三角形底边中点到两腰的距离相等.请利用图2证明这个命题.
已知:如图2,在等腰
中,
,点
为
中点,
于点
,
于点
.
求证:
.
(2)【一般探索】
在动手操作探究过程中,小明又发现,对于任意的等腰三角形,若将“点
为
中点”改为“点
为三角形外部一点,满足点
到等腰三角形的两顶点
的距离相等”,都能得到点
到两腰所在直线的距离相等,如图3所示.请补全已知,并证明.
已知:在等腰
中,
,
于点
,
于点
, .
求证:
.
(3)【问题拓展】
小明继续探究:利用已有学习经验,尝试改变条件和结论位置,提出猜想:对于平面上的一点
,若满足点
到一个三角形的两顶点
的距离相等,且点
到边
所在直线的距离相等,那么这个三角形是等腰三角形.小明认为这个猜想一定成立,但他的同学小强认为这个猜想不一定成立,你同意谁的想法?若同意小明的想法,请画图并说明理由;若同意小强的想法,请画出反例.
(1)【特例呈现】
如图1所示,数学活动课上,在折叠等腰三角形纸片的过程中,小明发现:等腰三角形底边中点到两腰的距离相等.请利用图2证明这个命题.
已知:如图2,在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/26ece633-1bff-4d47-b7c8-09b14f558584.png?resizew=385)
(2)【一般探索】
在动手操作探究过程中,小明又发现,对于任意的等腰三角形,若将“点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0520e9675bc1b416e8b8f01eb69fd13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
已知:在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761a77e11e1e45c2a8b2d34d22cf8e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7faabc484ce3666706c1beffda4bcfe2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/6d5c5416-d0b9-450c-9eb3-bd201d5993cd.png?resizew=150)
(3)【问题拓展】
小明继续探究:利用已有学习经验,尝试改变条件和结论位置,提出猜想:对于平面上的一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0520e9675bc1b416e8b8f01eb69fd13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5dc62e10004e73908091338362917da.png)
您最近一年使用:0次
5 . 如图,
是矩形
的对角线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/9c0f16d5-69d5-4c1f-92c3-fa23070a0898.png?resizew=143)
(1)作
的垂直平分线
交
于点E,交
于点F(尺规作图,保留作图痕迹,不写作法和证明);
(2)在(1)所作的图形中,连接
,求证:四边形
是菱形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/22/9c0f16d5-69d5-4c1f-92c3-fa23070a0898.png?resizew=143)
(1)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167593eea25543e3b3c6f60e209e9b73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)在(1)所作的图形中,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbe3114e3904346f34ffa843cbb3146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
您最近一年使用:0次
6 . 如图,已知在
中
边的垂直平分线
与
的平分线交于点
,
交
的延长线于点
,
交
于点
.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/bcf558ec-e21e-4361-8561-bc3b17bbaadd.png?resizew=169)
(1)
;
(2)猜想线段
的数量关系,并进行证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827beb23a9fe02a8b588645bcb82ce67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/bcf558ec-e21e-4361-8561-bc3b17bbaadd.png?resizew=169)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb65161f9508867ed7847606781fa7e.png)
(2)猜想线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f48c7063d8700f13fa8d7466b14462d.png)
您最近一年使用:0次
名校
7 . 教材呈现:如图是华师版八年级上册数学教材第
页的部分内容.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/765ba0db-f0f0-4869-a524-43d8e86e2c03.png?resizew=418)
定理证明:请根据教材中的分析,结合图
,写出“线段垂直平分线的性质定理”完整的证明过程.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/02bcbd31-ae31-4d94-abec-7f14e886335f.png?resizew=476)
定理应用:
(1)如图
,在
中,直线
分别是边
的垂直平分线,直线
、
交于点
,过点
作
于点
.求证:
.
(2)如图
,在
中,
,边
的垂直平分线交
于点
,边
的垂直平分线交
于点
.若
,
,则
的长为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0538cad6b26c7238b90e664bb68c27c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/765ba0db-f0f0-4869-a524-43d8e86e2c03.png?resizew=418)
定理证明:请根据教材中的分析,结合图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/02bcbd31-ae31-4d94-abec-7f14e886335f.png?resizew=476)
定理应用:
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0877194ab8760f54c35527177b03ff93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/887721a843b2dc8e947cc42d09868e33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efeccd375f7ee16b46cc1f5c22d1995f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d03a6074fa932d98728d6d61670aea7.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82e415812cca9545611c0faa0c01b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545ad5f3d39221f3390db9668f30257d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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8 . 在
中,
,
为
中点,
,射线
、
分别交直线
、
于
、
.
在射线
上,连接
,试判断
、
、
之间的数量关系并证明;
(2)如图2,
在射线
上,将
绕点
逆时针旋转
.
①如图3,当射线
交线段
于点
时,求证:
;
②当
时,若
,
,当
时,请直接写出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d95a92fcd0cd5e55f1d32d42504a5690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c042ff18466e8165fadf343d142a4b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598c4ff9fc8518fa4829e39254d3f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598c4ff9fc8518fa4829e39254d3f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e883f81c66ceef54d2d0556a68ed585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0e65e147b109f2bbfd3a3f502bbc3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07377d977ef6a8f518b3004564544e5b.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c042ff18466e8165fadf343d142a4b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbee6d5731d6f4bb1e4f2ba3d89b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efc7b22d85ff04a0ac89743f0bea1f2.png)
①如图3,当射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598c4ff9fc8518fa4829e39254d3f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9ab2152a2490ba50484c77cceeafa0.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ee0275440f5342f837cecb20871755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fa0a286a55692e4263a5993b01580b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4cb4069a2e1e90d1a9c4979ad09ca2.png)
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2024-01-17更新
|
190次组卷
|
5卷引用:四川省成都市金堂县成都七中育才学校2023-2024学年八年级上学期期中数学试题
四川省成都市金堂县成都七中育才学校2023-2024学年八年级上学期期中数学试题四川省成都市锦江区学道街中学(成都市七中育才学校学道分校)2023-2024学年八年级上学期期中数学试题四川省成都市锦江区师一学校2023-2024学年八年级上学期1月期末数学试题(已下线)第1章 三角形的证明(单元测试·拔尖卷)-2023-2024学年八年级数学下册基础知识专项突破讲与练(北师大版)(已下线)压轴真题必刷01 三角形的证明(压轴40题7种题型训练)-2023-2024学年八年级数学下学期期中考点大串讲(北师大版)
9 . 如图,过等边
的顶点A作
的垂线l,点P为l上点(不与点A重合),连接
,将线段
绕点C逆时针方向旋转
得到线段
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/662fe65e-c89a-41bd-b617-6591b7d7e8da.jpg?resizew=129)
(1)求证:
;
(2)连接
并延长交直线
于点D,若
.判断
和
的数量关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/662fe65e-c89a-41bd-b617-6591b7d7e8da.jpg?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7341c7d3b742bf451457145206782711.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3088fd880647adc6d7ed0cc72bc7e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
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名校
10 . 如图,在
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/7c238964-2218-4cdd-b3e2-e045b72fcb5d.png?resizew=160)
(1)尺规作图:作
的垂直平分线交
于点E,交
于点D,连接
.(保留作图痕迹,不写作法,不用下结论);
(2)在(1)的条件下,若
平分
.求证:
,
证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
为
的垂直平分线,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
平分
,
①______
在
与
中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082530b4f2d3525ca4b4bed019d53dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
(②______)
③______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
为
的垂直平分线,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
④______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/7c238964-2218-4cdd-b3e2-e045b72fcb5d.png?resizew=160)
(1)尺规作图:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8520a21b909d04f763d0f61dd74bc158.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fbbd17c89f03dbb61cd6ffdb9a0344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16834582e86f9c1030a4a4b316fab909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6949cee8636079470cfdaac047d42e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082530b4f2d3525ca4b4bed019d53dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9722deeb6a9300e959bf5deccc112ef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f3d198e76391779fa3badc848c8ac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8520a21b909d04f763d0f61dd74bc158.png)
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